[Deadening Plan Stage 3]
This is a more advanced plan based on our most popular "Stage 2."
Stage 3 uses 1.5 times the amount of aluminum reinforcement as usual. By significantly increasing the rigidity of the body panels, door resonance is more effectively suppressed. This results in tighter low-frequency response and a more powerful sound with clear definition.

In addition, the surface deadening material has also been upgraded. Not only has vibration control performance been improved, but durability and sound absorption have also been improved, thoroughly cutting out sound bleeding and the intrusion of external noise.

Features of Stage 3
Aluminum reinforcement bar increased by 1.5 times → Increased door rigidity for tighter bass

Upgraded to high-performance sound deadening material → Improved vibration control, sound absorption, and durability

Realizes an even higher-quality sound space while retaining the benefits of Stage 2

Recommended for
Those seeking an even greater improvement in sound quality than Stage 2

Those who want to fully enjoy tight, powerful bass

Those who want to maintain stable, high sound quality over the long term

Summary
For those who are satisfied with the perfection of "Stage 2" but want to aim even higher.
Stage 3 is a special plan for enjoying music on a deeper level.